Adjustable cutting apparatus.



G. S. LEMON. 4 ADJUSTABLE GUTTING APPARATUS.

APPLICATION IILBD MAR. a, 1911 993,607. Patented May 30, 1911.

2 SHEETS-SHEET 1.

ar/es 6. lemon 'rnl' NORRIS ."lfll! co. WASHINGTON, n.'C1

G. S. LEMON.

ADJUSTABLE CUTTING APPARATUS.

APPLIOATIOH FILED MAR. e, 1911.

993,607. Patented May 30, 1911.

a SHEETS-SHEET a.

.UNITED STATES PATENT OFFICE.

ADJUSTABLE CUTTING APPARATUS.

Specification of Letters Patent.

Application filed March 6, 1911.

Patented May 30, 1911. Serial No. 612,605.

To all whom it may concern:

Be it known that I, CHARLES S. LEMON, a citizen of the United States ofAmerica, re siding at Los Angeles, in the county of Los Angeles, Stateof California, have invented a certain new and useful Adjustable CuttingApparatus; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

This invention relates to adjustable cut ting apparatus, and it may besaid to consist in the provision of the novel features and in the noveland improved construction, arrangement and combination of the parts,members and devices in the apparatus, as will be apparent from thedescription and claims hereinafter.

Objects of the invention are to provide improved apparatus of the classspecified which is portable, simple in construction and economical tomanufacture, light and strong, easy to adjust to adapt it to performdifferent classes of work, effective in action, and possessed of novelfeatures which give it superiority over existing apparatus and whichmake it practical and marketable.

Another object of the invention is to provide novel and improved meanswhereby the arbor of the rotary cutter may be arranged for movementeither in a substantially horizontal direction at right angles to itsaxis, or ina substantially vertical direction, as may be desired.

A further object of the invention is to provide novel and improved meanseasily adjustable to raise or lower the table to the desired degree.

Other objects and the advantages of the invention will be apparent tothose skilled in the art from the following description of the preferredform of construction for the apparatus embodying it, when taken inconnection with the accompanying drawings, in which-- Figure 1 is a sideelevation of the apparatus with the rotary cutter arbor arranged totravel horizontally; Fig. 2 is a similar view, partly broken away, therotary cutter arbor being arranged to travel in a vertical direction;Fig. 3 is an elevation of the brace used when the rotary cutter isoperated in a vertical direction, the brace being shown detached; Fig. 4is an enlarged detail in elevation of one of the cams used in raisingand lowering the table; Fig. 5 is a partly broken away perspective viewof the apparatus, the cutter arbor being arranged to operate in ahorizontal direction; Fig. 6 is an enlarged perspective detail of one ofthe lower ends of the brace shown in Fig. 3; Fig. 7 is a diagrammaticview illustrating the manner in which the cutter arbor is caused totravel in a horizontal direction.

The supporting frame of the apparatus, preferably mounted on sills orskids 2 ma consist of crosspieces 3 (Fig. 5) attached to the sills orskids, uprights 4, longitudinal members 5 thereon, and crosspieces 6connected between the longitudinal members. The cutter mounting 7 maycomprise a swinging frame 8 having at its upper end bearings 9 whereinis mounted the cutter arbor 10; the lower end of the frame 8 beingpivotally connected to a second swinging frame 11 which has its endremote from frame 8, pivotally mounted on a shaft 12 which may besupported at one end by one of the uprights 4 and at the other'end byintermediate up right 13. In order to cause the cutter arbor 10 to movein a horizontal direction, frame 8 is preferably provided near its upperend with slots 14 having therein antifriction rollers 15 which travelupon curved guides 16 which pass through said slots 14 and are pivotallyattached at one end to a brace 17 secured to upright 13 and the adjacentupright 4, and also secured to one of the crosspieces 6 (Fig. 5). Theends of guides 16 remote from those just mentioned are provided withnotches 18 which rest upon a short shaft 19 secured to an upright 20 andto the adjacent upright 4. The curvature of guides 16 is such as tocompensate for the lowering of the cutter arbor 10 in its approachtoward each of its movements owing to the inclination of frame 8 fromthe vertical (see Fig. 7).

The operative connections between the cutter arbor 10 and the source ofpower may comprise a pulley 21 upon the arbor 10 which pulley isconnected by means of belt 22 to a pulley 23 loosely mounted upon theshaft 24 which formsthe pivotal connect-ion between frames 8 and 11.Pulley 23 is rigidly connected to pulley 25 which in its turn isconnected by means of a belt 26 with pulley 27 loosely mounted on shaft12. Pulley 27 is rigidly connected to pulley 28 which is connected bymeans of belt 29, with a source of power consisting, in this instance,

of an internal combustion engine which .may be mounted upon two or moreof the cross pieces 3. The pulleys 23 and 25 are preferably formed ofaluminum and may be of hollow construction to attain lightness.

The table 31 is preferably formed to have two parts 32 and 33 thereof onopposite sides of the cutter 48 separate and movably mounted on the topof the supporting frame of the apparatus In order to raise and lower theparts 32 and 33 each may be provided adjacent to its corners withbracket: 34 carrying rollers 35 which latter may rest in depressions 36of cams 37 (see Fig. 4). The general outline of these cams is in theform of a spiral whereby each successive depression 36 around theperiphery thereof is disposed at a slightly greater distance than itspredecessor from the center of rotation of the cam. The cams at each endof the table may be slidably mounted in common upon a square shaft 38.The shafts 38 have their ends protruding through longitudinal members 5in a position to be readily engaged by a key or wrench when it isdesired to adjust to the desired degree the height of the parts 32 and33 of the table.

To feed the cutter 48 in making a cut in a horizontal direction thearbor 10 may be moved by means of a cord 39 attached to an eye 40 (Fig.5) screwed into lug 41 on frame 8. Cord 39 may pass under grooved pulley42 and may be connected to quadrant 43 mounted upon square shaft 44which may be rotatively mounted between uprights 13 and 4. Adjacent toupright 4 (Fig. 1) shaft 44 may be provided with a second quadrant 45,preferably of smaller radius than quadrant 43, to which may be attachedcord 46 connected to pedal 47. The cutter may be returned to its initialposition by means of a weighted cord 49 attached to an eye '50 screwedinto lug 41. Cord 49 may pass over grooved pulley 51, preferablyattached to upright 20, and have attached to its lower end a weight 52.Guides 16 may be provided with stops 53 to limit the movement of frame8.

When it is desired to use the rotary cutter in making vertical cutsguides 16 may be disconnected from shaft 19 and raised to asubstantially vertical position; cord 49 having been previouslydisconnected from eye 50. The ends 54 of brace 55 may then be insertedinto the openings 56 in cross-piece 6 and the opposite ends 61 of thebrace attached to guides 16 by being sprung apart and passed at eachside of said guides until the holes 57 in the ends 61 are entered by theends of bolt 58 passing through guides 16. The ends 61 of brace 55 maythen be drawn together by nut 59 upon the bolt 60 which connects theends 61. A cord 62 of greater length than cord 49 may be attached to eye50, passed over pulley 63 and over pulley 51 and attached to weight 52.To compensate for the downward pull by gravity occasioned by the changedposition of the parts, there may be provided a retractile spring 64attached at one end to brace 55 and atits other end to a cord 65 passingover pulley 66 attached to brace 55, said cordpasing downwardly to itspoint of attachment to frame 8.

In the operation of the apparatus, assuming that it is desired to make acut requiring the cutter arbor to travel in a horizontal direction, theparts may be arranged as shown in Figsal and 5. Engine 30 being set inoperation and the table 31 having been adjusted to the desired height byrotating shafts 38, and the work being in position upon the table, pedal47 may be depressed, thus causing cord 46 to rotate quadrant 45, shaft44, and quadrant 43, drawing cord 39 toward the right (in the figure),thus moving frame 8 carrying arbor 10 and cutter 48, feeding the latterto thework to the desired extent. Upon release of pedal 47, weight 52,through cord 49, will draw frame 8 toward the left until furthermovement thereof is limited by the stops 53. It is to be understood thatwhen desired the usual gages may be applied to the table parallel withthe cutter and the latter used in the form of a rip saw in theordinarymanner with the frame 8 stationary. In using the rotary cutterfor vertical cuts, the parts of the apparatus may be arranged as shownin Fig. 2 and already described. In this use of the cutter, part 33 ofthe table may be removed and the work supported upon the part 32. Thedirection of pull of cord 39 being changed from horizontal to verticalby pulley 42, depressing the pedal 47 causes a downward movement of thearbor 10, feeding the cutter 48 through the work from above the same; Onrelease of the pedal 47 the lowered parts may be raised by the descentof weight 52 drawing cords 62 and the retraction of spring 64 drawingcord 65 as has already been described.

While one form of construction in which the invention may be embodiedhas been illustrated and particularly described, there are variouschanges and modifications thereof that will readily occur to thoseskilled in the art, and therefore the right is reserved to all suchchanges and modifications which do not depart from the spirit and scopeof the invention.

I claim: I

1. In apparatus of the class specified, the combination of a supportingframe, a shaft mounted thereon, a swinging frame on the shaft, a secondswinging frame connected with the first, a rotary cutter, carried by thesecond swinging frame, and means to cause said cutter to move in asubstantially horizontal direction, said means including swinging frameand adapted to travel on the guides.

2. In apparatus of the class specified, the combination of a supportingframe, a shaft mounted thereon, a swinging frame on the shaft, a secondswinging frame connected with the first, a rotary cutter carried by thesecond swinging frame, means including curved guides carried by thesupporting frame to cause said cutter to move in a substantiallyhorizontal direction, a table movably mounted on the supporting frame,and

means adapted to raise or lower said table.

3. In apparatus of the class specified, the combination of a supportingframe, a shaft mounted thereon, a swinging frame on the shaft, a secondswinging frame connected with the first, a rotary cutter carried by thesecond swinging frame, and means to cause said cutter to move in asubstantially vertical direction, said means including substantiallyvertically disposed guides carried by the supporting frame and a braceinterposed between sald guides and the supporting frame.

4. In apparatus of the class specified, the combinatlon of a supportingframe, a table movably mounted thereon, rollers mounted on the table,shafts mounted on the frame, and spiral cams mounted on the shafts, saidcams adapted to engage the rollers and provided with depressions on theperiphery thereof in which said rollers may rest, substantially asdescribed.

5. In apparatus of the class specified, the combination of a supportingframe, a shaft mounted thereon, a swinging frame on the shaft, a secondswinging frame connected with the first, a rotary cutter carried by thesecond swinging frame, and means to cause said cutter to move in asubstantially horizontal direction, said means including curved guidescarried by said supporting frames.

6. In apparatus of the class specified, the combination of a supportingframe, a shaft mounted thereon, a swinging frame on the shaft, a secondswinging frame connected with the first, a rotary cutter carried by thesecond swinging frame, pivotall mounted guides carried by the supportingfi ame, rollers on the second swinging frame adapted to travel on saidguides, a brace removably interposed between said-guides and saidsupporting frame, and means to operate the second swinging frame.

7. In apparatus of the class specified, the

combination of a supporting frame, a shaft mounted thereon, a swingingframe on the shaft, a second swinging frame connected with the first, arotary cutter carried by the second swin ing frame, pivotally mountedcurved gui es carried by the supporting frame, means to hold the guidesin a substantially horizontal position on'the supporting frame, meansdetachably connectable between said supporting frame and said guides tohold the latter in a substantially vertical position, rollers on thesecond swingin frame adapted to travel on said guides, an means tooperate the second swinging frame.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing Witnesses at Los Angeles, county of LosAngeles, State of California, this 28th day of February A. D. 1911.

CHARLES S. LEMON.

l/Vitnesses:

FRED A. MANSFIELD, A. H. Lronnns.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

